Patent · US Active

Method for the production of paper, cardboard and card

US7998314B2 · kind B2 · utility

3Cited by

7References

20Claims

0Family size

Assignee

BASF SE

Inventors

Oliver Koch · Eppelheim, DE
Frank Prechtl · Frankfurt, DE
Rainer Blum · Ludwigshafen, DE
Detlef Kannengiesser · Zwingenberg, DE

Key dates

Filing date	Dec 17, 2005
Grant date	Aug 16, 2011
Priority date	—
Expiry date	Dec 11, 2028

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H23/18
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method for the production of paper, cardboard and card by adding a microparticle system consisting of a polymer retention agent having a molar mass Mw of at least 2 million and a fine-part inorganic component in order to form a paper material having a material density of a 20 g/l maximum and by dewatering the paper material, wherein the paper material undergoes at least one shearing step prior to or after addition of the retention agent and wherein the retention agent is introduced in a dosed manner into the paper material in at least two places and the fine inorganic component is dosed prior to or after addition of the retention agent or between two dosing points for the retention agent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.